The Answer It Correct.for Example,Just Buy An Orange At Mangi's grossary Then Go Back Home.send Ur Young Brother To Take Another Orange Before U Have Eatten The One Which You Have Bought By Yourself.after He Has Brought It 2u,just Count,u Will Definetely Find Out That U Possess Two Oranges At The Same time.it Means, 1orange +1orange=2oranges.. Understood?